1. Gravitational Fields

2. Gravitational Fields Fields are commonly called “spheres of influence”
Fields, like forces, are vector quantities and therefore have a direction – shown by field lines
The more lines, the greater the field
Gravitational fields are what cause gravitational force
Since all masses have a gravitational force, all masses have a field

4. Calculating Gravitational Fields
There are two ways to calculate gravitational fields:
Using a TEST OBJECT
Using the object producing the greater field

5. Sample Problem
Calculate the gravitational field strength on the surface of the Earth

6. Sample Problem
On the surface of the Earth an object has a weight of 76.3 N and a mass of 7.78 kg. Using this information, what is the gravitational field strength on the surface of the Earth?

7. Homework p. 88 #1-8 Gravitation Quiz in 2 classes
Unit Exam in 4 classes